// pages/goodslist/list.js
Page({

    /**
     * 页面的初始数据
     */
    data: {
        baseURL:wx.baseURL,
        brandVisible:false,
        brandSelected:{},
        brandIds:'',
        brands:[],
        total:0,
        rows:[],
        query:{
            key:'',
            sorted:0,
            pageNum:1,
            pageSize:10
        }
    },
    inputKey(e){
        this.data.query.key = e.detail.value
    },
    refresh(next){
        this.data.query.pageNum = 1
        this.data.rows = []
        this.data.total = 0
        this.getList(next)
    },
    changeBrand(e){
        let brandSelected = this.data.brandSelected
        let id = e.currentTarget.dataset.id
        brandSelected[id] = !brandSelected[id]
        this.setData({
            brandSelected
        })
    },
    clearBrand(){
        this.setData({
            brandSelected:{}
        })
    },
    confimBrand(){
        let brandIds = []
        for(let key in this.data.brandSelected){
            if(this.data.brandSelected[key]) brandIds.push(key)
        }
        this.data.query.brandIds = brandIds.join(',')
        this.refresh(() => {
            this.setData({
                brandVisible:false
            })
        })
    },
    changeSorted(e){
        let sorted = e.currentTarget.dataset.sorted
        this.setData({
            'query.sorted':sorted
        })
        this.refresh()
    },
    getBrands(){
        wx.get('/brands').then(res => {
            this.setData({
                brands:res
            })
        })
    },
    getList(next){
        wx.get('/products',this.data.query).then(res => {
            res.rows.forEach((item,index) => {
                item.img = wx.baseURL + item.productImgs.split(',')[0]
            })
            this.setData({
                total:res.total,
                rows:this.data.rows.concat(res.rows)
            })
            if(typeof next == 'function') next()
        })
    },
    return:function(e){
        wx.navigateBack({
          delta: 1,
        })
    },
    changeBrandVisible(){
        let brandSelected = {}
        if(!this.data.brandVisible && this.data.query.brandIds){
            let brandIds = this.data.query.brandIds.split(',')
            for(let i =0;i < brandIds.length;i++){
                brandSelected[brandIds[i]] = true
            }
        }
        this.setData({
            brandVisible:!this.data.brandVisible,
            brandSelected
        })
    },
    detail(e){
        wx.navigateTo({
          url: '/pages/xiangqing/xiangqing?productId='+e.currentTarget.dataset.id,
        })
    },
    /**
     * 生命周期函数--监听页面加载
     */
    onLoad: function (options) {
        console.log(options.key)
        this.setData({
           'query.key':options.key || '',
           'query.brandIds':options.brandIds || ''
        })
        this.getBrands()
        this.getList()
    },

    /**
     * 生命周期函数--监听页面初次渲染完成
     */
    onReady: function () {

    },

    /**
     * 生命周期函数--监听页面显示
     */
    onShow: function () {

    },

    /**
     * 生命周期函数--监听页面隐藏
     */
    onHide: function () {

    },

    /**
     * 生命周期函数--监听页面卸载
     */
    onUnload: function () {

    },

    /**
     * 页面相关事件处理函数--监听用户下拉动作
     */
    onPullDownRefresh: function () {
        this.refresh(() =>{
            wx.stopPullDownRefresh()
        })
    },

    /**
     * 页面上拉触底事件的处理函数
     */
    onReachBottom: function () {
        this.data.query.pageNum ++
        if(this.data.rows.length < this.data.total) this.getList()
    },

    /**
     * 用户点击右上角分享
     */
    onShareAppMessage: function () {

    }
})